.weixin {
position: relative;
}

.weixin img.qrcode {
position: absolute;
z-index: 99;
top: -135px;
right: -28px;
width: 7.5rem;
max-width: none;
height: 7.5rem;
transform: scale(0);
transform-origin: top right;
opacity: 0;
border: .3125rem solid #0085ba;
border-radius: .25rem;
-webkit-transition: all .4s ease-in-out;
-o-transition: all .4s ease-in-out;
transition: all .4s ease-in-out;

}

.weixin:hover img.qrcode {
transform: scale(1);
opacity: 1;
}